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   &#160;<span id="projectnumber">0.1</span>
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<div class="title">event_dispatcher.h</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="preprocessor">#pragma once </span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="preprocessor">#include &quot;space\space.h&quot;</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="preprocessor">#include &quot;space\i_manager.h&quot;</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;</div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="preprocessor">#include &lt;boost\signal.hpp&gt;</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="preprocessor">#include &lt;boost\bind.hpp&gt;</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="preprocessor">#include &lt;boost\function.hpp&gt;</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;</div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#include &lt;memory&gt;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor">#include &lt;mutex&gt;</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &lt;concurrent_queue.h&gt;</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="preprocessor">#include &lt;concurrent_vector.h&gt;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;</div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="keyword">namespace </span>space {</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;</div>
<div class="line"><a name="l00017"></a><span class="lineno"><a class="code" href="classspace_1_1i__event.html">   17</a></span>&#160;    <span class="keyword">class </span><a class="code" href="classspace_1_1i__event.html">i_event</a> {</div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;</div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;    };</div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;    <span class="comment">//</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;    <span class="comment">// if the event manager is queued, the event objects need a copy constructor</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;    <span class="comment">// OR a copy object needs to be provided</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;    <span class="comment">//</span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;    <span class="keyword">template</span>&lt;u_<span class="keywordtype">int</span> EventCount, <span class="keyword">class</span> EventObjType, <span class="keyword">class</span> EventReturnType&gt;</div>
<div class="line"><a name="l00026"></a><span class="lineno"><a class="code" href="classspace_1_1base__event__dispatcher.html">   26</a></span>&#160;    <span class="keyword">class </span><a class="code" href="classspace_1_1base__event__dispatcher.html">base_event_dispatcher</a> : </div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;        <span class="keyword">public</span> <a class="code" href="classspace_1_1i__manager.html">i_manager</a></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;    {</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;    <span class="keyword">protected</span>:</div>
<div class="line"><a name="l00030"></a><span class="lineno"><a class="code" href="structspace_1_1base__event__dispatcher_1_1__t__event__wrapper.html">   30</a></span>&#160;        <span class="keyword">struct </span><a class="code" href="structspace_1_1base__event__dispatcher_1_1__t__event__wrapper.html">_t_event_wrapper</a> {</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;            <span class="keywordtype">int</span> type;</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;            EventObjType object;</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;            <a class="code" href="structspace_1_1base__event__dispatcher_1_1__t__event__wrapper.html">_t_event_wrapper</a>() {type=-1; <span class="keywordtype">object</span> = EventObjType(); }</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;            <a class="code" href="structspace_1_1base__event__dispatcher_1_1__t__event__wrapper.html">_t_event_wrapper</a>(u_int t, EventObjType o) {type=t; <span class="keywordtype">object</span>=o; }</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;            <a class="code" href="structspace_1_1base__event__dispatcher_1_1__t__event__wrapper.html">_t_event_wrapper</a>&amp; operator=(<a class="code" href="structspace_1_1base__event__dispatcher_1_1__t__event__wrapper.html">_t_event_wrapper</a> &amp;in) { this-&gt;type = in.type; this-&gt;<span class="keywordtype">object</span> = in.object; <span class="keywordflow">return</span> *<span class="keyword">this</span>;} </div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;        };</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;        <span class="keywordtype">bool</span> _queued;</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;        concurrency::concurrent_queue&lt; _t_event_wrapper &gt; _event_queue;</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;            </div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;        <span class="keyword">typedef</span> boost::signal&lt;EventReturnType(const EventObjType &amp;) &gt; _t_event_signal;</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;        <span class="comment">// signal stack is a vector of signals</span></div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;        concurrency::concurrent_vector&lt; shared_ptr&lt; _t_event_signal &gt; &gt; _signalStack;</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;        u_int _event_count;</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;    <span class="keyword">public</span>:</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;        <span class="keywordtype">bool</span> is_queued(<span class="keywordtype">void</span>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _queued; }</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;        <span class="keyword">template</span>&lt;<span class="keyword">class</span> T&gt;</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;        <a class="code" href="classspace_1_1result.html">result</a> add_event(u_int eventType, EventReturnType (T::* func)(<span class="keyword">const</span> EventObjType &amp;), T * obj) {</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;            <span class="comment">// if our event number is greater than our event count, we need to increment up to that</span></div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;            <span class="comment">//</span></div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;            <span class="keywordflow">if</span>(eventType &gt; _event_count) {</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;                <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = _event_count; i &lt;= eventType; i++) {</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;                    shared_ptr &lt;_t_event_signal&gt; eventRef = std::make_shared&lt;_t_event_signal&gt;();</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;                    this-&gt;_signalStack.push_back(eventRef);</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;                }</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;                _event_count = eventType;</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;            }</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;            this-&gt;_signalStack[eventType]-&gt;connect(boost::function&lt;EventReturnType (<span class="keyword">const</span> EventObjType &amp;)&gt;(boost::bind(func, obj, _1)));</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;            <span class="keywordflow">return</span> RESULT_OK;</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;        }</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;        EventReturnType on_event(u_int eventType, <span class="keyword">const</span> EventObjType &amp; event) {</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;            <span class="keywordflow">if</span>(this-&gt;_queued) {</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;                this-&gt;_event_queue.push(_t_event_wrapper(eventType, event));</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;                <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;            } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;                <span class="keywordflow">return</span> this-&gt;ex_event(eventType, event);</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;            }</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;        }</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;        EventReturnType ex_event(u_int eventType, <span class="keyword">const</span> EventObjType &amp;event) {</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;            <span class="keywordflow">if</span>(this-&gt;_signalStack[eventType]-&gt;empty())</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;                <span class="keywordflow">return</span> EventReturnType();</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;            <span class="keywordflow">return</span> this-&gt;_signalStack[eventType]-&gt;operator()(event);</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;        }</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;        result on_pre_update(i_engine *engine, <span class="keyword">const</span> <span class="keywordtype">float</span> delta) { <span class="keywordflow">return</span> RESULT_NOT_IMPL; }</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;        result on_post_update(i_engine *engine, <span class="keyword">const</span> <span class="keywordtype">float</span> delta) { <span class="keywordflow">return</span> RESULT_NOT_IMPL; }</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;        result on_update(i_engine *engine, <span class="keyword">const</span> <span class="keywordtype">float</span> delta) { </div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;            <span class="keywordflow">if</span>(this-&gt;_queued) {</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;                <span class="comment">// only dequeue whatever our current count is NOW</span></div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;                <span class="comment">// this means it could increase, but we dont care</span></div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;                _t_event_wrapper wrap;</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;                <span class="keywordflow">while</span>(_event_queue.try_pop(wrap)) {</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;                    this-&gt;ex_event(wrap.type, wrap.object);</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;                }</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;            }</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;        }</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;        result initialize() {</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;                 </div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;            <span class="comment">// Add our signal stack</span></div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = 0; i &lt; _event_count; i++) {</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;                shared_ptr &lt;_t_event_signal&gt; eventRef = std::make_shared&lt;_t_event_signal&gt;();</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;                this-&gt;_signalStack.push_back(eventRef);</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;            }</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;            <span class="keywordflow">return</span> RESULT_OK;</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;        }</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;        result release() { </div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;            shared_ptr &lt;_t_event_signal&gt; * eventRef;</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;            eventRef = <span class="keyword">new</span> shared_ptr &lt;_t_event_signal&gt;[_event_count];</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;            <span class="comment">// free our event queue if we are using it</span></div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;            _event_queue.clear();</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;            <span class="comment">// clear our event stack</span></div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = 0; i &lt; _event_count; i++) {</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;                eventRef[i] = this-&gt;_signalStack[i];</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;            }</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;            this-&gt;_signalStack.clear();</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;            <span class="comment">// now free them all</span></div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;            <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = 0; i &lt; _event_count; i++) {</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;                eventRef[i].reset();</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;                eventRef[i].reset();</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;            }</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;</div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;            <span class="keyword">delete</span> eventRef;</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;            <span class="keywordflow">return</span> RESULT_OK;</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;        }</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;        base_event_dispatcher() :</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;            _queued(false),</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;            _event_count(EventCount) { </div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;        }</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;        base_event_dispatcher(<span class="keyword">const</span> <span class="keywordtype">bool</span> queued) :</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;            _queued(queued),</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;            _event_count(EventCount) { </div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;            this-&gt;initialize();</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;        }</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;        ~base_event_dispatcher() {</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;            this-&gt;release();</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;        }</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;    };</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;};</div>
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